/Engine/Source/Editor/UnrealEd/Public/Kismet2/BlueprintEditorUtils.h
Sets the Deprecated flag on the variable with the specified name
static void SetVariableDeprecatedFlag ( [UBlueprint](API\Runtime\Engine\Engine\UBlueprint) * InBlueprint, const [FName](API\Runtime\Core\UObject\FName) & InVarName, const bool bInIsDeprecated )